Adie is an extremely fast and convenient programming text editor written using the FOX Toolkit.
Besides being a nice text editor, Adie is also an extremely convenient file viewer, supporting a plethora of methods to move from one file to the next.
Atom is a desktop application based on web technologies. Like other desktop apps, it has its own icon in the dock, native menus and dialogs, and full access to the file system.
A simple to use text editor for X windows.
CgEddie is a very simple editor for writing and compiling Cg shaders. It supports syntax highlighting (and also semantics), auto indentation, and multiple file editing. It uses the nVidia Cg compiler to check shaders at run-time.
An attempt at creating a code editor for GNUstep. The grand plan is to use it as a component in ProjectCenter, and also as a stand-alone application.
(commercial) CRISP is a modern text editor designed to give user the power and flexibility to enjoyably edit files on multiple Unix and Windows platforms. It incorporates all of the advanced concepts of vi, Emacs, BRIEF and various Windows products while presenting the most intuitive user interface possible.
CryptoTE is a text editor with integrated strong cryptography. It is based on the popular Scintilla widget and automatically stores text data in secure encrypted container files. Compared to other "password keeper" programs, CryptoTE does not force any structure upon your data: it works with plain ASCII text and does not require you to fill in grids, key-value attributes, or descriptions.
DrPython is a highly customizable, extensible editor/environment for developing programs written in the Python programming Language. It is implemented in wxPython.
Edile is meant to be a basic but useful cross-platform text editor, implemented in a single source code file and targeted toward system administration and scripting uses.
Epsilon Programmer's Editor
(commercial) A fast, powerful, customizable and extensible editor featuring EMACS and Brief key bindings, a concurrent process buffer, asynchronous Internet support, multi-file search & replace, smart C/C++ indenting, customizable syntax highlighting for C/C++/Java, Perl, HTML and TeX, integrated grep and tagging, bookmarks, file comparisons and more.
FXiTe is an advanced cross-platform text editor built with the Fox GUI toolkit and the FXScintilla text widget. It features built-in syntax highlighting for 40+ languages, an embedded Lua scripting engine, macro recording and playback, multi-line regular expression search and replace, rudimentary ctags and calltip support, a flexible interface to external tools, and a built-in "message window" to capture the output of external commands such as compiler error messages, etc.
Haroopad is an open source Markdown enabled document processor for creating web-friendly documents. With this software, you can author professional-looking documents of various formats: blog posts, slides, presentations, reports, email and more. Furthermore, you can send your documents as email. Read more
Marave is a distraction-free editor with a full screen interface. Most of the time, you will see no interface at all, except your text.
A free, graphic, multi-window, cross-platform text editor.
A text editor, started back in 1991, developed in conjunction with a complete multiwindow text environment, MVE. Its original name was med (MultiEDitor), because it could open multiple documents each in a window simultaneously.
Morla is an editor of RDF documents, written in C. It is based on libnxml and librdf libraries. With Morla you can manage more RDF documents simultaneously, visualize graphs and use templates for quick writing.
NEdit is a multi-purpose text editor for the X Window System, which combines a standard, easy to use, graphical user interface with the thorough functionality and stability required by users who edit text eight hours a day. It provides intensive support for development in a wide variety of languages, text processors, and other tools, but at the same time can be used productively by just about anyone who needs to edit text. NEdit, which is entirely a volunteer effort, benefits from a strong developer and user community.
(commercial) Pacu is a lightweight source code editor. It provides a responsive user interface with a low memory footprint. All functions are fully keyboard accessible and have been designed to fit on relatively smaller screens (>=1024x600).
poEdit is cross-platform gettext catalogs (.po files) editor. It is built with wxWidgets toolkit and can run on any platform supported by it (although it was only tested on Unix with GTK+ and Windows). It aims to provide more convenient approach to editing catalogs than launching vi and editing the file by hand.
PyPE (Python Programmers Editor) was written in order to offer a lightweight but powerful editor for those of you who think emacs is too much and idle is too little. Syntax highlighting is included out of the box, as is multiple open documents via tabs.
Qute is a text editor that offers TeX support and per-paragraph preview of markup (including typeset formulas)! It also an experiment in the visual aesthetics of text editing.
reSTEditor is a simple editor that enables the user to create and to edit reStructuredText, to have a quick preview of the output of his text and to export the document into various formats by clicking only one button.
(commercial) SEDIT is a powerful Windows and UNIX (tm) programmer's editor patterned after IBM's XEDIT and PDF editors. It provides a GUI interface which leverages the MOTIF or OPENLOOK X Window manager on UNIX and the standard GUI on Microsoft Windows to provide a text editing environment in which programmers familiar with IBM's mainframe XEDIT and/or PDF editors will feel quite comfortable.
(commercial) SlickEdit Inc. provides additional speed, power and flexibility to the most advanced code editor available. In the latest v10 release, SlickEdit has refined its look with updated icons and GUI, dockable tool windows, tab groups and auto hide tool windows.
Textadept is a fast, minimalist, and remarkably extensible cross-platform text editor. Read more
UberWriter is a open source minimalist text editor that is packed with features. It helps your text editing workflow. With this software, you get only one thing: an empty textbox. There are no setting, and no font to choose. Instead, you are left to concentrate purely on the content of your writing. You can use Markdown for all your markup needs. Read more
A mature editor using wxStyledTextCtrl which is based on Scintilla.
wyoEditor is especially designed to be easy usable through a well-designed GUI and is cross-platform to be used on many different platforms (e.g. Linux, MacOS, Windows). wyoEditor uses wxScintilla, an editing component of wxCode, which itself is based on the Scintilla library.
xae features include pop-up menus, journalling (to recover from system crash or loss of connection), cut-and-paste, multiple buffers (associated with files or not), and much more.
Xcoral is a multiwindow mouse-based text editor for Unix and X Window System. Syntax highlighting and auto-indentation are available. A built-in browser enables you to navigate through C functions, C++ and Java classes, methods and files. A SMall Ansi C Interpreter (Smac) is also built-in to dynamically extend the editor's possibilities (user functions, key bindings, modes etc). Xcoral provides regions and marks, kill-buffers, macros system and unlimited undo.
XMLmind XML Editor is a validating XML editor featuring a word processor-like view. It supports the DTD, W3C XML Schema, RELAX NG schemas, XML namespace, XSLT, XPath, XInclude, XML catalog standards.
zedit is a simple text editor that is meant to be very small and featureless.
A programmer's text editor and development environment for Linux and other systems running the X11 window system. Zoinks is a Mac-like programmer's editor that should seem familiar to people that have used MPW or CodeWarrior.